Microsoft has pushed Windows 10 Mobile/PC Build 14393.1944 (KB4053579) to those on Anniversary update.
You can check the update availability by going to Settings–>Update & Security–>Windows update–>Check for updates. Coming to what is there in changes/fixes/improvements, there are expectedly no significant changes. But there are lots of fixes and improvements.
You can check the

Microsoft has pushed Windows 10 Mobile/PC Build 14393.1914 (KB4051033) to those on Anniversary update.
You can check the update availability by going to Settings–>Update & Security–>Windows update–>Check for updates. Coming to what is there in changes/fixes/improvements, there are expectedly no significant changes. But there are lots of fixes and improvements.
You can check the